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SiEN18-622
Troubleshooting for Outdoor Unit
Troubleshooting
381
7.20 Inverter Current Abnormal
Remote Control
Display
L8
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected by current flowing in the power transistor.
Malfunction
Decision
Conditions
When overload in the compressor is detected.
Supposed
Causes
Compressor overload
Compressor coil disconnected
Defect of outdoor unit PCB (A1P)
Troubleshooting
(V
3
1
8
4)
Caution
NO
YE
S
NO
NO
NO
YE
S
YE
S
YE
S
Be
su
re to t
u
rn off power
s
witch
b
efore connect or di
s
connect connector,
or p
a
rt
s
d
a
m
a
ge m
a
y
b
e occ
u
rred.
O
u
tp
u
t c
u
rrent check
The
s
econd
a
ry
c
u
rrent of the inverter
i
s
higher th
a
n 24.9A,
260
s
ec. for e
a
ch
ph
as
e.
Compre
ss
or
in
s
pection The
compre
ss
or'
s
coil i
s
di
s
connected.
Di
s
connect the connection
b
etween the compre
ss
or
a
nd
inverter. M
a
ke the power
tr
a
n
s
i
s
tor check mode
s
etting
ON
b
y
s
ervice mode.
Inverter
o
u
tp
u
t volt
a
ge
check Inverter o
u
tp
u
t
volt
a
ge i
s
not
ba
l
a
nced
(Norm
a
l if within
±
5V).
M
us
t
b
e me
asu
red
when fre
qu
ency i
s
s
t
ab
le.
After t
u
rning on
a
g
a
in, "L
8
"
b
link
s
a
g
a
in.
Compre
ss
or overlo
a
d
In
s
pection of the compre
ss
or
a
nd
refriger
a
nt
s
y
s
tem i
s
re
qu
ired.
Repl
a
ce the compre
ss
or.
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd
(A1P).
Re
s
et
a
nd re
s
t
a
rt.
Compre
ss
or in
s
pection
In
s
pect
a
ccording to the di
a
gno
s
i
s
proced
u
re for odd noi
s
e
s
, vi
b
r
a
tion
a
nd oper
a
ting
s
t
a
t
us
of the
compre
ss
or.
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...